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Finding the Fourth Proportional to 653.94, 979.95 and 422.46

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Solution

The fourth proportional to 653.94, 979.95 and 422.46 is: 633.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.94 : 979.95 = 422.46 : x
  2. Step 2: Convert to fraction form
    653.94/979.95 = 422.46/x
  3. Step 3: Cross multiply
    653.94x = 979.95 × 422.46
  4. Step 4: Simplify right side
    653.94x = 413,989.68
  5. Step 5: Solve for x
    x = 413,989.68/653.94
  6. Step 6: Final answer
    x = 633.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.